Bobation oe new yoke



Jan. 27. 1925. 1,524,365

L. C. MYERS ET AL FULL STROKE MECHANISM Original Filed July 12, 1923 3sheets sheet 1 Jan. 27. 1925.

L. C. MYERS ET AL FULL STROKE MECHANISM Original Filed July 12, 1923 3sheets sheet L. C. MYERS ET AL FULL STROKE MECHANISM 3 Sheets-Sheet m NNuwm H a m .w MN a WW NWA/ m y Q J O w n Jr m V. N\ H. m. -mm 1 m a Q N$/n1 m unwu w l u w Qwl mm. i m A r %W H N.

Patented den. 27, W25.

LEWIS o. m nns, or rannroiar, AND

earner ni ric GEO'RGE F. HANDLEY, F GLENDALE, NEW YORK,

ASSIGNORS '10 ROYAL TYPE-WRITER COME'ANY, INCL, OF NEW YORK, N. Y., ACOR- POR-ATION 0]? NEW YORK.

FULL-$TROKE MECHANISM.

Drlglnal application filed July 12, 1923, Serial No. 651,073. Dividedand this application filed April 21, 1924:. Serial No. 707,894.

To all whom it may concern:

Be it known that we, Lnwrs C. MYERS, a citizen of the United States, andresident of Freeport, in the county of Nassau and State of New York, andGEORGE F. HAND- LEY, a citizen of the United States, and resident ofGlendale, in the county of Queens and State of New York, have inventedcertain new and useful Improvements in Full-Stroke Mechanism, of whichthe following is a specification.

This application is a division of our application Serial No. 651,073,filedJuly 12, 1923.

An object of the invention is to provide a full stroke mechanism whichwill prevent the depressed key from returning to normal position beforeit has been fully depressed.

Another object of the invention is to provide such a mechanism whichwill prevent the depressed key from being operated a second time untilit has fully returned to normal position.

Another object is to provlde full stroke mechanism of such character forkeys which print certain specific characters and are also connected tocounters which register the number of times that each key has beendepressed.

lin the parent application the invention has been illustrated inconnection with a particular type of typewriting machine, but theinvention covered by this divisional application is not limited to atypewriting machine. It may be employed in computing machines, cashregisters, and in general, in any type of machine where the operation ofa key performs such functions that it is necessary for it to becompletely operated before returning to normal position, and tocompletely return to normal position before being operated a secondtime.

As herein described a typewriting ma chine is provided with two keys,one for printing .05 and the other for printing .10, and each of thesekeys is connected to an individual register for counting the number oftimes the particular key is depressed. As is well known, the printingoperation might be erformed without a complete depression oi the key,while the register is onl operated when the key is fully depressed?Furthermore, the key might be operated a second time to print withoutawaiting a full return to normal position, but such return is necessaryto a correct operation of the register. Therefore the full strokemechanism is of great value in connection with such keys.

In the drawings Figure 1 is a top plan view of a portion of atypewriting machine, showing the special keys, the registers, and theirgeneral relation to the remainder of the machine.

Figure 2 is a side elevation with parts in section of the operatingmeans for the counters and the full stroke mechanism.

Figure 3 is a front elevation with parts in section of the full strokemechanism at the right hand side of the machine and the connection fromthe key lever to the counter.

Figure 4 is a detail view showing the connections from the keys to thecounters.

Figure 5 is a View of the counter at the left hand side of the machinewith the connection for operating the same.

Figure 6 is a front view of a portion of the full stroke mechanism.

Figure 7 is a side View with parts in section of the full strokemechanism with one of the keys fully depressed.

Figure 8 is a similar view with the parts at the beginning of theupstroke of the key.

Figure 9 is a rear view of the front stroke mechanism with the levers insection.

Figure 10 is a horizontal section through the front stroke mechanism.

Figure 11 is a horizontal section through the guide member shown inFigure 6 when attached to the frame.

The invention is illustrated as embodied in a machine having a mainframe A, key levers B, type bars D, connections C between the type barsand key levers, top plate E and platen F. These parts may be of anydesired character and are not illustrated nor described in detail.

Two special key levers B and B are provided, the first actuated by afinger key 1 and connected to a register or counter 2 which will countthe number of times the key lever has been depressed, and the latteractuated by a finger key 3 and connected to a similar counter 4. In theembodiment here shown, the key lever B is connected to a ty )0. barwhich prints .10 while the key lever 2 is connected to a type bar whichprints .05. So far as certain features of the invention are concerned,it is entirely immaterial what characters are printed by the operationof the respective keys, or whether they operate a printing mechanism orsome other instrumentality.

These counters may be of any old or de sired type. The counter 2 issupported by a bracket 5 which has an ear connected by a screw 6 to acomb plate G which extends across the front of the machine. Thenumerals7 may be read through an opening 8 in the top plate of the machine. Afinger piece 9 on the shaft 10 of the counter 2 1S used for resettingthe same, and this shaft has an arm 11 connected by a link 12 to the keylever B.

At the left hand side of the machine a counter 4 is supported by abracket 14which has an ear connected by a screw 15 to the comb plate G,and the numerals 16 may be read through an opening 17 in the top plateof the machine. A finger piece 18 on the shaft 19 of this counter isused to reset the same, and the shaft has fastened to it an arm 20 towhich is attached a link 21. The brackets 5 and 14 each have dependingarms 22 in which is mounted a shaft 23 which extends across the machine.The link 21 is connected to an arm 24 carried by a collar 25 on thisshaft. Near the right hand of the machine the shaft 23 is provided witha collar 26 having an arm 27 which is connected by a link 28 to the keylever B It is therefore evident that whenever one of the keys 1' or 3 isdepressed, the appropriate numeral will be printed and simultaneouslythe counter will be operated, so that the number of depressions of eachkey will be registered.

Since the levers B and B not only operate the type action to print butalso operate the counting mechanism, it is very important that thelevers be depressed to their full extent before beginning the returnmovement, and also that they may not be depressed a second time beforethey have returned fully to normal position. We have, therefore,provided simple but efiicient full- StliOlIG mechanism which will attainthis resu t.

A bracket member 29 of the form clearly shown in Figure 6 is attached byscrews 30 which pass through holes 31 therein to the front comb plate32. This bracket has two ears 33 near its lower end which are providedwith slots 34. Near the top two ears 35 are provided with teeth 36,which face the front and project downwardly. About in itsmiddle-portion, the bracket has rearwardly extending ears 37 in which ismounted a pivot pin 38 on which turns a frame comprising side arms 39which are spaced by collars 40 from the ears 37. A spring 41 coiledaround the pin 38 may bear at one end against a side arm 39 and at theother against a frame member H which is provided with a buffer I for thereturn movement of the key levers. The arms 39 are connected at theirupper ends by a cross bar or rod 42 and each arm has teeth 43 on itsfront edge which extend upwardly.

To each key lever is pivoted a lever 44 on a pivot 45. These leversextend upwardly and are guided in-the slots 34 of the bracket 29. At theupper end each lever 44 has a tooth 46 that is bent inward at an angleto the plane of the lever and is in a position to cooperate with theadjacent ratchet teeth 36. Near the upper end each lever 44 also has atooth 47 extending rearwardly in the lane of the lever and cooperatingwhen the l zey is depressed with the teeth 43- on the arm 39. Each lever44 also has a lug 48 somewhat below ,its upper end which contacts withthe comb guide 32 to limit the rearward movement of the lever. At thelower end of the lever is connected a spring 49 which extends forwardlyand is attached to the key lever at 50.

When the key B for example is de ressed, the tooth 46 asses down infront of t e teeth 36 and is he (1 in contact with them by the spring49, which rocks the lever 44 on its pivot 45. The key lever cannot,therefore, move upward on account of the engagement of the tooth 46 withthe teeth 36. As soon as the lever has been fully depressed, the tooth46 passes beneath the lowermost tooth 36 and springs rearwardly into theposition of Figure 7 in which the key lever is fully depressed. As soonas the upward movement begins, the tooth 47 passes over the teeth 43 andafter it has pamed one of these teeth as shown in Figure 8, it cannot bedepressed until it has moved all of the way up to normal position. Theforward movement of the arms 39 is limited by the engagement of the heelportion 39' with the comb plate, but durin the upward movement of thelever 44 t e frame formed of the side arms 39 will be cammed rearwardlyagainst the tension of the spring 41 as shown in Figure 8. When the keylever returns to normal position the tooth 47 engages the upper portionof the side arms 39 and is moved to normal position as in Figure 2.

This full stroke mechanism, therefore, prevents the return of adepressed ke to normal position before it has been lly depressed, andalso revents a second depression ofthe key efore it has returnedentirely to normal position.

It is obvious that the invention is not limited to any specific t pe ofmachine, and that modifications an changes may be madetherein withoutdeparting from the to, a series of ratchet teeth on each of saidbrackets, and a lever pivoted to the key lever and having teethcooperating with said ratchet teeth.

2. A full stroke mechanism for a key lever comprising a bracket attachedto the machine frame, a second bracket pivoted thereto, a series ofratchet teeth on each of said brackets, one series facing downwardly andthe other upwardly, and a spring drawn lever pivoted to the key leverand having separate teeth to cooperate with the two series ofratchetteeth.

3. A full stroke mechanism for a key lever comprising a bracket attachedto the machine frame, a second bracket movably carried thereb teeth oneach of said brackets, and a mem er movably connected to the key leverand cooperating successively With the teeth on the brackets to preventmovement in either direction until the normal movement in the otherdirection has been com pleted.

4:. A full stroke mechanism for a key lever comprising a fixed set ofteeth and a movable set of teeth each carried by the machine frame, anda movable member carried by the key lever and having a separate tooth tocooperate with each of said sets.

5. A full stroke mechanism for a key lever comprising a fixed set ofteeth and a movable set of teeth each carried by the machine frame, amovable member carried by the key lever, a tooth projecting therefrom inone plane to cooperate with the fixed set of teethand a tooth projectingtherefrom in another plane to cooperate With the movable set of teeth.

In testimony whereof, We have hereunto subscribed our names.

LEWIS C. MYERS. GEORGE F. HANDLEY.

